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Decellularized Apple-Derived Scaffolds for Bone Tissue Engineering In Vitro and In Vivo
Published on: February 23, 2024
Bone tissue engineering with novel rhBMP2-PLLA composite scaffolds.
Po-Chun Chang1, Bu-Yuan Liu, Cheng-Meei Liu
1Graduate Institute of Clinical Dentistry, College of Medicine, National Taiwan University and University Hospital, Taipei, Taiwan.
Journal of Biomedical Materials Research. Part A
|January 18, 2007
Summary
This study developed a novel polylactic acid (PLLA) scaffold that effectively delivers recombinant bone morphogenetic protein 2 (rhBMP2) to promote bone formation. The rhBMP2-PLLA composite scaffold successfully induced bone regeneration in rats within two weeks.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Polylactic acid (PLLA) scaffolds are utilized in tissue engineering.
- Controlling the release of growth factors like recombinant bone morphogenetic protein 2 (rhBMP2) is crucial for effective bone regeneration.
- Novel composite scaffolds are needed to enhance delivery and efficacy of bone morphogenetic proteins.
Purpose of the Study:
- To fabricate a novel porous PLLA composite scaffold.
- To evaluate the scaffold's capacity for carrying and releasing rhBMP2.
- To assess the bone-inducing potential of the rhBMP2-loaded PLLA scaffold in vivo.
Main Methods:
- Scanning Electron Microscopy (SEM) for scaffold structure analysis.
- Enzyme-Linked Immunosorbent Assay (ELISA) for controlled rhBMP2 release.
- In vivo study in Wistar rats using Masson's trichrome, von Kossa staining, and immunohistochemistry.
Main Results:
- PLLA scaffolds showed moderate foreign body reactions, alleviated by rhBMP2.
- Enhanced collagen matrix deposition and endochondral ossification observed in rhBMP2-PLLA scaffolds.
- Bone sialoprotein and osteopontin expression confirmed, with Von Kossa staining indicating mineralization by 10-14 days.
Conclusions:
- The novel PLLA scaffold effectively carries and releases rhBMP2.
- rhBMP2-PLLA composite scaffolds demonstrated significant bone formation capacity within two weeks.
- These findings suggest the potential applicability of rhBMP2-PLLA scaffolds in bone tissue engineering.
